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3. Bangun 1 ( yang diatas ) = panjang × Lebar
= 58cm × 32cm
= 1.856cm²
Bangun 2 = Alas × tinggi ÷ 2
= 35cm ( 58cm - 23cm = 35) × 28cm ( 60cm - 32cm ) ÷ 2
= 35cm × 14cm
= 490cm²
Jadi luas Bangun 1 + Luas bangun 2 = 1.856cm² + 490cm² = 2.346cm²
Maaf kalau salah dan semoga bermanfaat